Uplift of these mountainranges did not occur during a single geologic period, but instead occurred at different times in the geologic past in response to the ever-changing plate tectonic forces that were being exerted along the western edge of the North American plate.

Mountainranges within a particular geotectonic province are likely to have undergone uplift during roughly similar times, although such uplift could have occurred over periods of tens of millions of years.

The present physiographies of the mountainranges and landscape in the major geologic provinces are not only profoundly influenced by their tectonic origins and properties of the rocks they are made of, but are shaped by erosional processes and the present and past regional climate.

Segment of the northern Rocky Mountains in the United States, extending east-southeastward for 50 miles (80 km) from the Stillwater River, in southern Montana, to the Clarks Fork of the Yellowstone River, in northwestern Wyoming.

The Bitterroot Range (a subrange of the Rocky Mountains) runs along the border of Montana and Idaho in the northwestern United States.

Point to each mountainrange as it is discussed and write the height of the tallest peak on the chalk board when mentioned.

The AndesMountains are rich in mineral resources such as gold and silver and are therefore considered by some to be the most valuable mountains in the world.

Explain that they are going to pretend that they are a member of a mountain explorers' club and the club has asked them to take on the assignment of writing a travel guide for people interested in exploring a particular mountain or mountainrange.

Along these roughly north-south-trending faults mountains were uplifted and valleys down-dropped, producing the distinctive alternating pattern of linear mountainranges and valleys of the Basin and Range province.

Although there are other types of faults in the Basin and Range province, the extension and crustal stretching that have shaped the present landscape produce mostly normal faults.

As the rocky ranges rise, they are immediately subject to weathering and erosion.

As a example, without a classification system the list of the range high points of North America could have thousands of entries for everything from the high point of a major chain like the Rocky Mountains down to that of a low range of minor hills.

Official range names are always the first choice, but an area of mountians may be named after the highland, plateau, island, archipelago, plains, valley, or other physical feature that defines the area best.

When a range or mountain grouping has no clear name, a bogus name is created, using real range names, directional indicators, political unit names, or whatever other logical name best describes the area.

Folding of these mountains was caused by pressure from the shock wave initiated by the giant meteorite impact east of Africa.

Their list of mountainranges mostly includes the "collision" and "brake" mountains of Shock Dynamics which are raised in the latter part of this 26-hour event.

The conditions prior to the Shock Dynamics event may have been quite different than they are today, ranging from the transparency and chemical balance of the atmosphere, to the volume and chemistry of the oceans, to the depth, composition, and solidity of sediments on the protocontinent, to the properties of the crust.

The highest mountainrange in the world, the snow-capped Himalayas, is an example of a continent-to-continent collision.

This could be why the Andes, a long mountainrange bordering the west coast of South America, appears to be growing higher.

This scraping adds thickness and buoyancy to the mountains so that they float upward more rapidly than their peaks can be eroded by wind and rain.

www.platetectonics.com /book/page_11.asp (603 words)

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A mountainrange is a grouping of mountains usually caused by tectonic plate interactions.

A mountainrange (also cordillera or sierra) is a grouping of mountains (often elongated) usually caused by tectonic plate interactions.

Singular mountains are often the result of volcanic processes but in some instances, such as the Hawaiian Islands these processes can result in a chain of mountains that might be considered a mountainrange.